Two coins were tossed 10 times. The results are shown on the table.
Toss:1,2,3,4,5,6,7,8,9,10
Result:Hh TT hit th ht hh th tt th hit
What is the experimental probability that at least one of the coims landed on heads? Express probability as a decimal.
My answer is 0.2
your answer is for none of the coins landing on heads
8 out of ten tosses had at least one head
What is the answer then?
To find the experimental probability that at least one of the coins landed on heads, you need to count the number of times heads was obtained and divide it by the total number of tosses.
Looking at the results, we can see that there are a total of 8 outcomes with heads (H) and 2 outcomes with tails (T).
Therefore, the probability of getting heads on a single toss is 8/10, which simplifies to 0.8.
However, the question asks for the probability of at least one coin landing on heads. This means we need to consider all scenarios where at least one heads occurs.
Analyzing each result, we see that in tosses 1, 3, 5, 6, 8, and 10 there was at least one heads. That is a total of 6 out of 10 tosses.
Thus, the experimental probability that at least one of the coins landed on heads is 6/10, which simplifies to 0.6.
Hence, your answer of 0.2 is incorrect.
The correct answer is 0.6.